#include<stdio.h>
void butler(void);/* ANSI/ISO C函数原型 */
int main(void) {
	printf("I will summon the bulter function.\n");
	butler();
	printf("Yes. Bring me some tea and writeable DVDs.\n");

	return 0;
}
void butler(void) { /* 函数定义开始 */
	printf("You rang, sir?\n");
}
